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Mental Maths Questions Worksheet for Class 5

Mental maths lesson 19: Mixed mental challenge · Set 648 · 40 questions
TalentJR

How to do it in your head (Look first): A 9, 19 or 99 → round and adjust. Two close numbers → count up (or near doubles when adding). × or ÷ by 4 or 8 → double or halve; other sums → split into tens and ones.

NameDateTime takenScore ___ / 40
  1. 1.19² =
  2. 2.23 + 22 =
  3. 3.You buy a pencil box for ₹52 and pay with a ₹100 note. How much change do you get, in rupees?
  4. 4.What is the remainder when 52 is divided by 5?
  5. 5.Double 54 =
  6. 6.22 + 23 =
  7. 7.77 − 48 =
  8. 8.84 − 57 =
  9. 9.Best estimate of 855 + 749? (a) 1600 (b) 1400 (c) 1800
  10. 10.21² =
  11. 11.64 + 55 =
  12. 12.12² =
  13. 13.92 × 7 =
  14. 14.What is the remainder when 43 is divided by 3?
  15. 15.19 × 5 =
  16. 16.25% of ₹830 =
  17. 17.102 − 77 =
  18. 18.28 + 5 =
  19. 19.Half of 62 =
  20. 20.97 × 9 =
  21. 21.Best estimate of 16 × 36? (a) 8000 (b) 800 (c) 80
  22. 22.18² =
  23. 23.107 − 79 =
  24. 24.56 children stand in rows of 6. How many full rows can they make?
  25. 25.10% of ₹320 =
  26. 26.29 + 31 =
  27. 27.Half of 126 =
  28. 28.You start your homework at 2:15 and finish at 3:20. How many minutes did you work?
  29. 29.88 − 29 =
  30. 30.192 ÷ 4 =
  31. 31.156 ÷ 4 =
  32. 32.34 + 82 =
  33. 33.85 + 73 =
  34. 34.78 − 39 =
  35. 35.15 + 17 =
  36. 36.90 ÷ 6 =
  37. 37.49 + ? = 100
  38. 38.5% of ₹390 =
  39. 39.Double 39 =
  40. 40.80 − 41 =

Answer key

  1. 361
  2. 45
  3. 48
  4. 2
  5. 108
  6. 45
  7. 29
  8. 27
  9. 1600
  10. 441
  11. 119
  12. 144
  13. 644
  14. 1
  15. 95
  16. 207.5
  17. 25
  18. 33
  19. 31
  20. 873
  21. 800
  22. 324
  23. 28
  24. 9
  25. 32
  26. 60
  27. 63
  28. 65
  29. 59
  30. 48
  31. 39
  32. 116
  33. 158
  34. 39
  35. 32
  36. 15
  37. 51
  38. 19.5
  39. 78
  40. 39

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